BY .1. H. MAIDEN. 189 



they are intermediate between the two species. Most of the 

 seeds are, however, sterile, and these are pale reddish-brown in 

 colour, shining, and mostly boomerang-shaped. 



Tiie sterile seeds of E calophylla are similar in shape, perhaps 

 a little darker in colour. 



It seems to me that, in this rose-crimson series, we have in- 

 controvertible evidence of hybridisation, the two most obvious 

 factors being colour and size; and T, therefore, add E. calophylla 

 and E. fici/olia to the very long list of pairs of species of which 

 the evidence that they hybridise appears to be sufficiently clear. 



I have touched on the general question of hybridisation in 

 the genus in Report Aust Assoc. Adv. Science, 1904, p.'297, in 

 the Proceedings of this Society, xxx., p. 492 (1905), and on many 

 other occasions. 



